If only Samsung would allow USB to Ethernet connectivity; then I'll be very happy.
OTG cable. USB Ethernet adapter. Voila!
That said, my N3 had absolutely no problem connecting to my Linksys - which was one of the original G routers. Probably about 12 years old. The router finally gave up the ghost. The only advantage I have now is a slightly greater range and WPS (which the N3 loves).
I was in Sam's Club today and figured I'd try their app. You can scan the barcodes as you put things in the cart, and when you check out, you're checking out 1 item - your total. It connects to SOME wifi (I didn't look to see if it's their in-house AT&T or something else), because when I tried to access something on it from the other end of the parking lot, the app complained that it had no network connection. Since I've already connected to AT&T, and it's unsecured, the thing probably connected to AT&T while it was in my pocket.
(No joy, though - they're having problems with the system. The app worked, their in-house computer didn't.)
The supermarket I shopped at when I was back in NY had scanners and an app to use on an Android (and never enough charged scanners). It's a great way to shop. Fill 2 shopping baskets and checkout in the express line with one item. I just hope more stores start using things like that.
But bottom line - I've never had an Android not connect to a properly set up wifi signal. I have had MANY Windows computers not connect easily back in 98 days, but 7 and 8 will connect unless the router isn't set up right. About the only problem is security. Unless you want to run a RADIUS server, almost anyone can crack your password these days. And many people in the - shall we say "shady" professions? - can read https like an open book.
If it's not connected, it can't be hacked. One of these days I expect to see someone hacking a computer not connected to the outside world - through its power cable plugged into the wall. (I grew up with prop-driven airliners, now I carry a computer in my shirt pocket that's many times more powerful than the first network server I set up.)